Colorimeter



' 1,6293; May 24,1927. READER 09 COLORIMETER Filed Dec. 2l. 1921 3 Sheets-Sheet 1 IHF'WHI!" I wbm J- P. BADER COLORIMETER May 24, 1927.

Filed Deo. 2l, 1921 3 Sheets-Sheet 2 Hummrnmmumw I n,"QMM

` ATToRNEy May 2431.927.

J. P. BADER coLoRIMETEn 4. filed Deo. 21, 1921 3 Sheets-Sme?. 3

I INKENIR BY i ATTORNEY Patented May 24, 1927.

JOSEPH P BADER, F NEW YORK, N. Y.,

AssIGNon, To THE `'mams COMPANY; or

NEW YORK, N. Y., A CORPORATION OF TEXAS.

COLOBIMETER.

`.Application led December 21, 1921.- Serial No. 523,819.

This invention relates to improvements in colorimeters or instruments for making tests to determine the color 'valuesof various materials particularly of gasoline, kerosene, lubricating oil or other products of petroleum.

One object of the inventlon 1s to .provide improved means for the examination and color analysis of liquids of the character described.

Another object relates to the provision of testing equipment whereby the color values of liquid being tested may be comared to definite standards. h

Another object relates to the provision of means whereby the color code combination may be indicated and may be read off 1n a minimum of time.

Other objects will appear from the following description of tie invention taken in connection with the drawings, 1n which Fig. 1 is a transverse section of' a cabinet within which the colorimeter of my 1nvention may be applied, v

Fig. 2 is an end elevation of the colorimeter with parts broken away.

Fig. 3 is a section taken on the line 3-3 of Fig. 2, Y

Fig. 4 is a plan view of the colorimeter,

Fig. 5 is a horizontal'seetion taken on the line 5-5 of Fig. 2, and

Fig. 6 is a section taken on the line 6-6 of Fig. 5.

Like reference characters denote like parts in the several figures of the drawings. Referring to Fig. 1 of the drawings there is shown one embodiment of my invention applied to a light cabinet comprising a suitable table 10 and a cabinet 11 made of' wood and suitably panelled to i provide access to the interior thereof. In

the upper portion of the interior of the cabinet there is mounted in any suitable -manner a source of light 12 ot conventional design containing suitable electric light bulb (not shown) supplied by current from a pair of conductors such as 13. The soijrrce of' light 12 includes a reflector adaptedto 'throw the light upon a reflecting screen 14 mounted upon a wall ot' the cabinet 11 and arranged to throw reflected light into the colorimeter. The opposite wall is provided with an aperture' or peep-hole through which projects an eye-piece 15 forming a part of the colorimeter.

-ent from each other.

The colorimeter comprises a tripod or lmetal stand and a pair of spaced supports 21 for supporting the base 22. As clearly shown in Fig. 3 one end of the base 22 is provided with a pair of spaced parallel upright flanges 23 and 24, to one of which is secured the eye-piece 15. A portion ot' each of the flanges extends laterally to one side of the base 22 (see Fig. 4) thus forming a support for a bearing 25`for a pair of rotatable members or wheels 26 and 27. The upright flange 24 is hollow and positioned therein is a plurality of mirrors such as 30 and 31, whereby parallel raynsof light such as 32 and 33 may be diverted into the single eye-piece 15 (see Fig. 5). It is understood, however that the, prisms shown may be replaced by suitable mirrors or other equivalent devices. The rays of light collectively indicated by the broken line designated 33 are reflected from the screen 14 and are passed through the material being tested lwhich may be contained in a suitable transulcent container such as 34 or may be contained ina relatively large container 35 shown by the dotted lines in Fig. 1. The arrangement of the wheels 26 and 27 is such that the rays of light collectively indicated by the broken line designated 32 and reflected from the screen 14 ass through screens provided near the periplliery v of the wheels. An opaque partition 36 is provided for separating the li ht rays 32 and 33 and for preventing leaage ot' the li ht.

gEach of the wheels 26 and 27 is provided with a plurality of apertures such as 40 and 41 and modnted in each aperture is a color screen such as 42; screens of the wheel 26 are differently characterized with respect to color, and their characteristics are preferably widely differ- The color screens of the wheel 27 are also different from each other but in this case, different from each other by relatively small degrees ot' difference. The edges of the wheels are notched and a roller 43 is secured to a spring member 44 and forms in combination with these. notches impositive stops for maintaining the Wheels in definite positions. The wheel 27 is provided with a plurality of apertures 45 through which may be observed a number of plates 46 appearing on the face of the wheel. 26. A suitable peep-hole or The several color Window may be. provided in the Well of the cabinet 11 whereby the operator may look through the aperture 45 and observe the code indication on the wheel 26. As indicated in Fig. 2 an additional code is placed upon the surface of the Wheel 27 vand the two codes in combination indicate the combination of color screens which are in use. A pointer 47 is provided for indicating the code combinations which are to be read.

In operation a suitable quantity of liquid to be tested is pfaced in a container such as 34 or 35 and the source of light 12 is made active. The observer places his eye in front of the eye-piece 15 and rotates the wheels 26 and 27 until he obtains the same color as a result of the light rays passed through the color screen as is the case with the rays passed through the liquid. The arrangement is such that the field of vision observed through the eye-piece is divided into two equal portions one of which is affected by the rays passed through the color screens and the other of which is affected by the rays passed through the liquid to be tested. Thus accurate observations may be made and the color characteristics of a liquid may be determined in terms of color codes as represented by the numerals observed opposite the pointer 47 When the color tintsare balanced. It Will be notedthat the readings may be taken practically instantaneously and that the operator may modify the color screens used very quickly by merely manipulating the Wheels. e

Apparatus of preferred\form and construction has been illustrated and described for the purpose of showing a Way in which this invention may be practiced, but the inventive thought upon which this application is based is broader than this illustrative embodiment. It is therefore understood that the scope of the invention is not to be limited by the present disclosure, reference being had to the appended claims for that purpose.

What is claimed is:

l. A colorimeter comprising in coinbination, a source of light, Za plurality of rotatable Wheels each provided with a plurality of color screens of varying color characteristics. each of said wheels having designated numbers applied to one face thereof and one of said Wheels having a plurality of apertures for observing the numbers on Athe .face of the other wheel. means for directing sundry rays of light through the object being tested and other rays throughcertain of the color screens i n said Wheels, and a single means for observing said rays of light iu proximity.

2. A colorimeter comprising a source of light, a plurality of rotatable disks provided with color screens, an eye-piece, means for separating the rays of light projected from said source and passing some of said rays through an object being tested and others through certain of the color screens, and means for subsequentlyconverging the separated rays to meet in juxtaposition upon a common field of vision before the eye-piece.

3. A colorimeter comprising a plurality of rotatable disks, each provided With color screens of varying characteristics, means for projecting a plurality of light rays from a' common source, means for controlling the direction of projection of said rays whereby some rays pass through the object being` tested and others pass through one or more of the color screens, andnmeans for converging by reflection all of said light rays in proximity.

4. A colorimeter comprising in combination, a source of lighta plurality of adjustable color screens,an eye-piece, means for separately projecting sundry rays of light through the material being tested and other rays through a selected combination of color screens. and for subsequently converging the rays of light to meetin juxtaposition upon a common field of vision before said eyepiece.

5. A colorinieter comprising an eye-piece, a pluraity of rotatable Wheels each provided with a series of color screens of varying characteristics, a source of light, means for simultaneously passing some of the rays of light from said source through an object being tested and other rays through certain of the color screens, and means including a plurality of mirrors for subsequently diverting the several rays of light into the eyepiece for comparison.

6. A colorimeter comprising a source of light, an eye-piece, a plurality of rotatable Whee's each provided with a series of color screens of varying characteristics. means for simultaneously projecting certain of the rays of light from beingtestcd and other rays through a selected combination of color screens, arbitrarily chosen marks for identifying the particularrolor screens through which light is passing, and means for subsequently diverting all of said light rays to lneet upon aconnnen field of vision before said eye-piece.

7. A coloriineter comprising rin combination, a source of light, means for directing independent rays thereof in separated pat-hs in one of which is disposed the object being tested. adjustable means `for selectively interposing certain of a plurality of graded color screens in the other path of light rays, and means for converging the -separated light rays by reflection to meet in juxtaposition on a common field of vision.

In,l Witness whereof I have hereunto setmy hand this 17th dav of December, 1921.

JOSEPH P. BADER.

said source through the object 

